Apparatus for extracting aromatic oils



F. C. RUFF.

APPARATUS FOR EXTRACTING ARGMATIC OILS.

APPLlcAlowmfD JAN.15.19|1.

LSMAQQ. mmm @un 211919.

FREDERICK C. RUFJF, 0F 110% ANGELES, CLFOMIA, ASSIGNOR TO BY-PRDUCTS trastorno or counts.,

@EMAS EUR EKTRACTZ'ENG UMATIC UIELS.

release;

epeciicaton of Letters Patent.

Patenten oetu ai, rara,

Application filed Jau-nary 15, im?. Serial No. Matti.

provide an apparatus for converting crudel mineral oils or fractions of the same into aromatic oils, as henae'ne, toluene or the like,

ln the accompanying drawing, the ligure s vertical section. of my improved appa lig-eferring` tothe drawing, l indicates a device, such as a centrifugal pump, for feeding crude oil into a pipe 2, which leads into a lower chamber 3 of a furnace Al, and is coiled therein, as shown at 5, the temperature of the furnace, the number of coils of pipe therein, and the velocity of the oil therethrough being such as to impart to the oil emerging from said pipe a temperature of from 600o to 800 F., After leaving the chamber 3 of the furnace, the pipe passes through the lower portion of the wall of a round lorick furnace 6 and discharges into an evaporator Z1 Clhe lovvermost portion of said evaporator is protected h v a Wall 8 of brick, which is intensely heated ley the lourn-1 ers 9 of the furnacen The temperature in this retort is from 800o to l,000 h. At this temperature the oil is cracked, and permanent gases and carbon are produced. rf he upper portion of the interior of the retort is equipped with perforated plates l0 having overflow pipes 1l whereby any heavy particles of heavy oil or carbon, which would be carried away hy the rapidily moving vapors and gases, and so would clog up the retort, or the outlet of the retort, are

`held back, and flow down to the bottom of the retort, in which the heavy residue containing the carbon particles is collected, and from Which it is discharged, 'lhis discharge of heavy residue is so regulated by/a valve 12 that the lovver part of the retort, which is heated, is always :filled With oil to prevent coklng.

'lhe vapors and gases escape from the top of the retort, and in order to thoroughly crack these vaporized oils, they are passed through another pipe coil 13 heated in an upper furnace chamber 14 to about the same temperature as they had When leaving the4 retorti The vapors and gases passing through the pipes at considerable speed carry the carbon particles along which are formed by the slight cracking during this part of the operation, and the vapors and gases escape into a vessel l5, having a gage glass i6, 1n which vessel the temperature drops to between 400o and 450 and some of the vapors are condensed., The vapors enter said vessel l5 at the hottom, so that, to arrest the carbon particles, they pass through the liquid, oil condensed from said vapors, which liquid oil is discharged from time te time through a pipe 17, which leads to a fuel oil storage tank (not shown), ld rom said vessel l5 a pipe 18 leads to a condenser 19, in which it is cooled and the vapors condensed, and then into a receiving tank 20 in which the oil` of a boiling point of, or less than, 450 l?. is collected, While the fined gases Which are not condensed at ordinary temperatures, and some vapors carried away With them, are conducted by a pipe 21ste a scrubber and gas holder.,

rl`he oil in said receiving tank 20 flows through the bottom thereof to pipes 22, each atl mitted to the tops of said tanks by pipes 26.

rlhe oil is forced hy the pressure of said compressed air alternately from said tanks vthrough pipes 27 having therein check valves 28 and connected to a pipe 27 leading into a third furnace 29 in which it is heated to a temperature of from 1,000o to 1,600 F. 'lhe oil in said pipe 27 is maintained under a pressure of from d5 to 75 pounds. By this last operation carbon is separated, which settles on the Walls of thepipe, but the carhon is of such a quality that it can be easily removed during the operation; An auxiliary coil is kept ready in case of necessity, and this auxiliary coil may be operated While the first one is cleaned out. After passing through said furnace 29, the pipe 27 leads to a box 30, in which carbon escaping from the pipe 27 may be collected, and then the vapors and gases pass by a pipe 3l to the bottom of a Washing tank 32, in which pipe 33 having therein a throttle valve 34 to means for rotecting the lower portion of 1o a condenser, scruuloer and gas holder (not the retort rom the direct action of seid shown). burners, perforated plates in the upper por- I ciaim1 tion of the retort through which ow the va- 5 vThe combination of a furnace, a coil of pers and fixed gases. generated, and means pipe therein, means for forcing crude oil or for cracking the vaporized oil flowing from 15 a,l vfraction thereof at high speed throu h said furnace. said pipe, a retort into which said pipe lea s, a furnace around the retort, yburners therein, 'FREDERUK C. RUFF. 

